Patent GB-1238445-A (GB)
IPC: H01Q15/16
Filed: 1969-01-15
Abstract: 1,238,445. Aerials. MASCHINENFABRIK AUGSBURG-NUBNBERG A.G. 15 Jan., 1969 [15 Jan., 1968], No. 2398/69. Heading H4A. An adjusting arrangement for radio reflectors comprises an adjusting element allowing adjustment of a radio reflector member or members from the side of the reflecting surface. The adjusting element is mounted on the reflector supporting structure at a point where adjustment takes place, and it provides support and clamping means arranged upon a threaded member mounted upon the supporting structure, and adjustable by tilting and by movement therealong. As described, in an adjusting element 2, Fig. 1, a threaded bolt 6 is mounted upon a supporting structure 1 by means of spherical seating members 8, 9, 10, 8, or 11, 12, 13, 11 and a slotted clamping nut 14. A disc shaped nut 4 on the bolt 6 acts as a support means for a reflector member 3, flanges 7 of which are held between the upper face of the support means 4 and the lower face of a circular flange of a cylindrical clamping means 5. The said means 5 has a plain bore of somewhat larger diameter than the bolt 6 and it is provided with pins 18, 19 which fit into axial grooves 16, 17 formed through the support means 4. A protective gainter 25 is provided between the seating member 10 and the underside of the member 3, and a lid 24 is provided on the upper reflective side of the said member, to cover a well 23 containing the upper part of the adjusting element 2. When adjusting the reflector member 3 the slots in the nut 14 may be engaged (the nut 15 and the clamping means 5 having first been removed) by a tool having keys which pass through the grooves 16, 17 in the support means 4, when the bolt 6 may be released by application of a spanner to a squared portion 21 at its upper end. The bolt 6 may be tilted by about Œ10 degrees, as required. The support means 4 may be rotated upon the bolt 6, with subsequent axial adjustment of the member 3 (nut 15 having first been loosened) by a spanner which engages holes 20. In a second embodiment, the slotted nut 14, Fig. 1, is released by a nut (27), Fig. 3 (not shown) which is prevented from rotating by a pin (26) welded to the supporting structure (1), said engaging with a grooved extension from said nut. Thus, the bolt (6) may be released for adjustment by simply turning the squared portion (21) at its upper end. In this embodiment, the means (4) is similar in shape to the means (5), and grooves do not pass through its entire length. In a third embodiment, which is similar to the second embodiment, a support means (4<SP>1</SP>), Fig. 4, not shown, is provided at its upper end, which projects into the well (23), with an externally threaded portion upon which a clamping means (5<SP>1</SP>), which is a disc-shaped nut, is screwed. Anti-friction linings (30) may be provided between the clamping surfaces of the means (4<SP>1</SP>) ,  (5<SP>1</SP>) and of the reflector member (3). In a fourth embodiment, a threaded bolt 6, Fig. 6, is fitted at right angles to a supporting structure 1. Adjustment of the distance of the reflector member 3 from the structure 1 is provided by a hollow screw 31, which has a squared end 21 and is provided with a nut 15. The reflector member 3 is mounted upon the screw 31 between a flange 34 and a nut 35, with locking plate 36, by a ball and socket arrangement comprising members 32, 4<SP>11</SP>, 5<SP>11</SP>, 33 so that it may be tiltably adjusted. A reflector member (3), Fig. 7 (not shown) is arranged for the fitting of six adjusting elements, and one of the holes through which the threaded bolts (6) pass is elongated to allow further adjustment. It is stated that one adjusting element may be common to two or to four adjacent elements, being located, along adjacent edges or at adjacent corners, respectively.